METI heretofore has excluded portable lithium ion storage batteries with built-in lithium ion storage batteries from the scope of regulated products under the PSE Act. However, to address the current trend of an increasing number of accidents involved in such batteries being reported, METI decided to include such batteries in the scope of regulated electrical appliances（in the category of lithium ion storage batteries）, and revise the notification to clarify.

This revision will require manufacturers and importers of portable lithium ion storage batteries to fulfill obligations under the PSE Act, including i）ensuring conformity of products with technical requirements, ii）inspection of finished products and record keeping, and iii）labeling products with the PSE mark. Bearing in mind the impact of these requirements on markets, METI will set a transitional period of one year after the revision; beyond this period, i.e. after February 1, 2019, nobody will be allowed to manufacture, import or sell mobile batteries that do not comply with the technical requirements or other rules stipulated in the PSE Act.